20565681440

素因数分解:

$2^5\times 5^1\times {\mathrm{2311}}^1\times {\mathrm{55619}}^1$

素因数の和:57945

約数の個数: 48

約数和(自身を含む): 48608320320

約数和(自身を除く): 28042638880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 2311, 4622, 9244, 11555, 18488, 23110, 36976, 46220, 55619, 73952, 92440, 111238, 184880, 222476, 278095, 369760, 444952, 556190, 889904, 1112380, 1779808, 2224760, 4449520, 8899040, 128535509, 257071018, 514142036, 642677545, 1028284072, 1285355090, 2056568144, 2570710180, 4113136288, 5141420360, 10282840720, 20565681440]

約数ペア:

[(1, 20565681440), (2, 10282840720), (4, 5141420360), (5, 4113136288), (8, 2570710180), (10, 2056568144), (16, 1285355090), (20, 1028284072), (32, 642677545), (40, 514142036), (80, 257071018), (160, 128535509), (2311, 8899040), (4622, 4449520), (9244, 2224760), (11555, 1779808), (18488, 1112380), (23110, 889904), (36976, 556190), (46220, 444952), (55619, 369760), (73952, 278095), (92440, 222476), (111238, 184880)]